Perf regression: json_middleware

[pr-benchmarks]

Scenario	Environment	Date	Old RPS	New RPS	Change	Deviation	StDev	Dependencies
json_middleware [Fixed]	Json 10k 7- Trends Amd Lin2	08/31/2025 04:23:37	350,712	342,179	-2.43 % (-8,533) 👎	-2.54 σ	3,362.37	Changes Name Version Diff Microsoft.AspNetCore.Antiforgery.dll 10.0.0-rc.2.25428.108 -> 10.0.0-rc.2.25429.103 dotnet/dotnet@3a5e29a...f53e1cf Microsoft.AspNetCore.App 10.0.0-rc.2.25428.108 -> 10.0.0-rc.2.25429.103 3a5e29a...f53e1cf Microsoft.NETCore.App 10.0.0-rc.2.25428.108 -> 10.0.0-rc.2.25429.103 dotnet/runtime@3a5e29a...f53e1cf

PowerBI Dashboard

@sebastienros